Arrangement pertaining to an implement attachment

Abstract

The arrangement is for coupling an implement attachment to a working arm of a working machine. The arm is connected to the implement attachment through the medium of fastener sleeves and fastener pins. The attachment includes two side-plates which each carry two bushings that include holes for accommodating the fastener pins. The bushings have a circular guide portion which fits into a circular hole in respective side-plates. The bushings include a respective flange that is connected to the side-plates by a fastener element. The hole, that receives respective fastener pins, is positioned eccentrically in relation to the guide portion in respect of at least two of the bushings.

1. An arrangement for coupling an implement attachment to a working arm of a working machine, comprising:
 an implement attachment having two side-plates which each carry two bushings having openings defined therein for receiving fastener pins; 
 the side-plates have a circular hole defined therein, the bushings being adapted to fit in the circular hole; 
 the bushings being secured to the side-plates by a fastener element; 
 each bushing having a round guide portion, each round guide portion being rotatable within one of the circular holes of the side-plates, each guide portion having an opening defined therein for receiving one of the fastener pins; and 
 the openings being eccentrically positioned in at least one of the bushings for each side-plate so that a rotational positioning of the bushings is selectable to align the eccentric openings of the bushings with a position of the fastener pins prior to securing the bushings with the fastener element wherein each fastener pin is locked to the round guide portion by a second fastener element that is screwed into a screw-threaded hole in the round guide portion. 
 
   
   
     2. An arrangement according to  claim 1 , characterized in that the fastener element extends through respective side-plates and is anchored to a flange of each respective bushing. 
   
   
     3. An arrangement according to  claim 1 , characterized in that the thickness of a flange is adapted so that the flange fills-out a distance between the side-plates and end parts of fastener sleeves. 
   
   
     4. An arrangement according to  claim 1 , characterized in that the side-plates are connected to an implement, tool, or mounting system. 
   
   
     5. A method of coupling an implement attachment to a working arm of a working machine, comprising:
 connecting the arm to the implement attachment via fastener sleeves and first and second fastener pins, 
 providing the implement attachment with two side-plates which each carry two bushings that have openings defined therein for receiving said fastener pins where at least one bushing carried by each side-plate has an eccentrically positioned opening defined therein; 
 providing at least one bushing having a round guide portion which rotatably fits into a circular hole defined in the side-plates; 
 selecting a rotational position of the eccentric opening of one of the round guide portions to set a desired distance between the first and the second fastener pin; 
 locking the bushings in the selected rotational position by activating a fastening element to prevent rotational movement of the bushing; and 
 locking the first fastener pin to the round guide portion by anchoring a fastener to the round guide portion. 
 
   
   
     6. A method according to  claim 5 , wherein the method further comprises screwing the fastener into a screw-threaded hole in the round guide portion and adapting the attachment to varying length measurements of the fastener sleeves, by varying a thickness of a flange provided on each respective bushing. 
   
   
     7. An arrangement for coupling an implement attachment to a working arm of a working machine, comprising:
 an implement attachment having two side-plates which each carry two bushings having openings defined therein for receiving fastener pins; 
 the side-plates have a circular hole defined therein, the bushings being adapted to fit in the circular hole; 
 the bushings being secured to the side-plates by a fastener element; 
 each bushing having a round guide portion, each round guide portion being rotatable within one of the circular holes of the side-plates, each guide portion having an opening defined therein for receiving one of the fastener pins; and 
 the openings being eccentrically positioned in at least one of the bushings for each side-plate so that a rotational positioning of the bushings is selectable to align the eccentric openings of the bushings with a position of the fastener pins prior to securing the bushings with the fastener element wherein each fastener pin is locked to the round guide portion by a second fastener element that is anchored within the round guide portion.